Difference between revisions of "Planet X"
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(New page: Before complicated astronomical devices were perfected, the true number of planets was unknown. Planet X was referred to as a planet in the Solar System that had not yet been discovered.) |
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Before complicated astronomical devices were perfected, the true number of planets was unknown. Planet X was referred to as a planet in the Solar System that had not yet been discovered. | Before complicated astronomical devices were perfected, the true number of planets was unknown. Planet X was referred to as a planet in the Solar System that had not yet been discovered. | ||
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Revision as of 20:09, March 28, 2009
Before complicated astronomical devices were perfected, the true number of planets was unknown. Planet X was referred to as a planet in the Solar System that had not yet been discovered.